X = int(input())

kyu = [400, 600, 800, 1000, 1200, 1400, 1600, 1800, 2000]
for i in range(9):
    if X < kyu[i]:
        print(9 - i)
        exit() X = int(input()) X int(input()) int input() input kyu = [400, 600, 800, 1000, 1200, 1400, 1600, 1800, 2000] kyu [400, 600, 800, 1000, 1200, 1400, 1600, 1800, 2000] 400 600 800 1000 1200 1400 1600 1800 2000 for i in range(9):
    if X < kyu[i]:
        print(9 - i)
        exit() i range(9) range 9 if X < kyu[i]:
        print(9 - i)
        exit() X < kyu[i] X kyu[i] kyu i print(9 - i) print 9 - i 9 i exit() exit X = int(input()) int(input()) X kyu = [400, 600, 800, 1000, 1200, 1400, 1600, 1800, 2000] [400, 600, 800, 1000, 1200, 1400, 1600, 1800, 2000] kyu
X = int(input())

kyu = [400, 600, 800, 1000, 1200, 1400, 1600, 1800, 2000]
for i in range(9):
    if X < kyu[i]:
        print(9 - i)
        exit()
